Wired has a great article on a bunch of nonsense products you can waste you money on. I applaud their efforts and showing this nonsense to the world, I could only dream of having the exposure the author of that article has though Wired. I am a little disappointed the Purple Tesla energy Shield didn't make the list, although the Q-Ray was first.... good enough.
My favorite part is the comments. These folks focus on the calling out of water dowsing. They insist that it works, or that they saw it working, etc etc.
Folks..... there is always water. If the dowser 'found' water in one place, you can bet its all around the area also. Its all a matter of how near the surface the water is, something the dowser will never tell you. The confirmation bias is so strong on this its unbelievable. No homeowner is going to dig another hole after they already found water! No matter where the dowser tells you, he is going to be right. That is why we study this sort of thing, and of course, every time, water dowsers do no better than chance.